Created attachment 1671206 [details]
Firefox description in GNOME Software
There is a "=" character in the AppData summary translations, see: https://src.fedoraproject.org/rpms/firefox/blob/master/f/firefox.appdata.xml.in#_7
It is displayed on Firefox details page in GNOME Software and it definitely should not be there (see the attached screenshot).
Daniel, do you mind to provide a patch for it?
Sure, here it is. :-)
Created attachment 1671422 [details]
Fix summary in AppData
Added to firefox-74.0-12.fc33 thanks.